Summary
The week from Wednesday 20 May to Monday 25 May shifted from gas-heavy weekdays into a cleaner, wind-led weekend. The strongest renewable day in the available data was Wednesday 20 May, when wind, solar and hydro together averaged 59.5% of measured generation across settlement periods. Gas was highest on Thursday 21 May and lowest on Wednesday 20 May.
For flexible electricity use, the cleanest opportunities are likely to appear when wind is strong, gas is low and demand is not at a peak. This is the foundation for future EV-charging guidance, clean-electricity alerts and weekly newsletter summaries.
The reporting period in key numbers
| Average measured generation | ~22.3 GW across available settlement-period aggregates |
|---|---|
| Highest renewable share | 59.5% on Wednesday 20 May |
| Highest average wind output | ~11.5 GW on Wednesday 20 May |
| Highest average solar output | ~5.0 GW on Sunday 24 May |
| Highest average gas output | ~6.6 GW on Thursday 21 May |
Weekly brief
Get this as a weekly brief
The newsletter turns reports like this into a short weekly summary of renewables, gas, carbon intensity, records and cleaner electricity windows.
Data notes
Compiled by Energy Mix from Elexon generation data and NESO embedded-generation estimates. Energy Mix calculates the totals, averages and comparisons shown here. Source data may be revised. Source attribution does not mean that Elexon or NESO has reviewed or endorsed this report.
Sources: Elexon Insights FUELHH; NESO Historic GB Generation Mix; NESO Demand Data Update. These datasets can share underlying observations; agreement is not independent certification.
Renewable-share and gas-output comparisons are not measurements of carbon intensity. See data sources and methodology for source information. A report-specific reproducible evidence pack was not preserved for this publication.
Original publication introduction and methodology note
A measured weekly report for EnergyMix.info using the available 7-day historical generation feed for Wednesday 20 May to Monday 25 May.
No report-specific methodology note was preserved.
Preserved as part of the original publication. Any broad validation wording in this note should not be read as proof that all reporting days or narrative claims were checked.
Related pages
Weekly brief
Get the weekly UK electricity mix briefing
A short, source-backed brief on renewables, gas, carbon intensity, records and cleaner electricity windows.
Need this for a site or product?
EnergyMix.info is also testing lightweight publisher widgets and selected data access for partners.